I used to have the jukebox multimedia 20. Which is just an smaller earlier version of the 320 that doesn't have realtime recording. i had it connected to a bigger 5.6" screen. Anyways that was my first "carputer". It had 3 major flaws.
1. you had to reencode all the video to divx 320x240 (more or less)
2. No GPS
3. At the time i had mine there was no car charger for it.